HSK10+
zhāo, zhōu
chirp
Phonosemantic compound. 口 represents the meaning and 周 represents the sound.
口 Meaning component
kǒu
mouth
周 Sound component
zhōu
cycle
Seal script
Regular script
啁
zhāo
chirp, twitter, twittering
twittering of birds
啁啾
Academia Sinica
Make Me a Hanzi
Unicode
Baxter-Sagart
Dong Chinese
CC-CEDICT
MTSU Chinese text computing